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Monthly climate in Merrill, Wisconsin, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Merrill features a humid continental climate (Dfb). Temperatures typically range between -9 °C (16 °F) and 21 °C (70 °F) through the year, but rarely can drop to -34 °C (-29 °F) or can rise to as high as 34 °C (94 °F). The average annual precipitation amounts to about 969 mm (38.2 inches) and receives 121 rainy days on the 1 mm (0.04 inches) threshold annually. Merrill enjoys an average of 2822 hours of sunshine throughout the year, and daylight varies from 8 hours 47 minutes to 15 hours 33 minutes per day.

Monthly average temperatures in Merrill, Wisconsin, United States §

The warmest months in Merrill are June, July and August, with daily mean temperatures ranging from 19 to 21 °C (66 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -6 °C (16 - 22 °F) throughout the day. On average each year, Merrill experiences 49 days above 25 °C (77.0 °F) and 153 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Merrill, Wisconsin, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 6°C
(43°F)		 14°C
(57°F)		 17°C
(63°F)		 26°C
(79°F)		 33°C
(92°F)		 34°C
(94°F)		 33°C
(91°F)		 31°C
(89°F)		 31°C
(89°F)		 26°C
(80°F)		 22°C
(73°F)		 14°C
(58°F)
Mean maximum 4°C
(39°F)		 8°C
(46°F)		 14°C
(57°F)		 21°C
(71°F)		 28°C
(83°F)		 32°C
(89°F)		 31°C
(89°F)		 30°C
(86°F)		 29°C
(84°F)		 24°C
(76°F)		 14°C
(57°F)		 10°C
(50°F)
Average high -5°C
(23°F)		 -4°C
(25°F)		 4°C
(39°F)		 10°C
(50°F)		 18°C
(65°F)		 24°C
(76°F)		 26°C
(79°F)		 24°C
(76°F)		 21°C
(70°F)		 12°C
(54°F)		 3°C
(38°F)		 -2°C
(29°F)
Daily mean -9°C
(16°F)		 -9°C
(16°F)		 -1°C
(30°F)		 5°C
(41°F)		 13°C
(56°F)		 19°C
(66°F)		 21°C
(70°F)		 19°C
(67°F)		 15°C
(60°F)		 8°C
(46°F)		 -1°C
(31°F)		 -6°C
(22°F)
Average low -13°C
(9°F)		 -14°C
(7°F)		 -6°C
(21°F)		 -0°C
(32°F)		 8°C
(46°F)		 14°C
(57°F)		 16°C
(61°F)		 14°C
(57°F)		 10°C
(51°F)		 4°C
(39°F)		 -4°C
(25°F)		 -10°C
(15°F)
Mean minimum -28°C
(-18°F)		 -27°C
(-16°F)		 -20°C
(-3°F)		 -10°C
(15°F)		 -1°C
(31°F)		 9°C
(48°F)		 11°C
(52°F)		 8°C
(46°F)		 3°C
(37°F)		 -5°C
(24°F)		 -13°C
(8°F)		 -23°C
(-9°F)
Minimum -32°C
(-25°F)		 -34°C
(-29°F)		 -26°C
(-15°F)		 -19°C
(-1°F)		 -3°C
(27°F)		 4°C
(40°F)		 10°C
(50°F)		 4°C
(40°F)		 -0°C
(31°F)		 -7°C
(20°F)		 -16°C
(3°F)		 -30°C
(-22°F)

Compare climate in Merrill with other places

Compare temperature, precipitation, sunshine, UV index in Merrill, Wisconsin, United States with other places around the world.

Monthly average precipitation in Merrill, Wisconsin, United States §

Merrill usually has the most precipitation in July, August and October, with an average of 12 rainy days and 118 mm (4.6 inches) of precipitation per month. The driest months in Merrill are January, March and November. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Merrill, Wisconsin, United States. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 32 (1.3) 51 (2.0) 49 (1.9) 98 (3.8) 100 (3.9) 99 (3.9) 119 (4.7) 117 (4.6) 85 (3.3) 116 (4.6) 49 (1.9) 53 (2.1)
Average precipitation days (≥ 1 mm) 6 8 8 13 12 12 12 12 11 12 7 8

Monthly sunshine hours in Merrill, Wisconsin, United States §

The sunniest months in Merrill are June, July and August, when the sun shines an average of 10 hours 50 minutes a day. Least sunny months in Merrill: January, November and December receive an average of 4 hours 42 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Merrill, Wisconsin, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 118 197 235 232 282 330 356 310 254 189 170 142
Mean daily daylight hours 9h 11m 10h 24m 11h 57m 13h 32m 14h 53m 15h 33m 15h 11m 13h 59m 12h 27m 10h 53m 9h 30m 8h 47m

Solar UV radiation in Merrill, Wisconsin, United States §

Merrill experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Merrill UV Index data.

Average daily maximum UV levels by month for Merrill, Wisconsin, United States. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 5 7 8 10 9 9 7 5 3 2

Detailed Monthly Weather Insights for Merrill, Wisconsin, United States

Discover in-depth weather details for every month in Merrill. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Merrill's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.